Lawn mower grinder



Aug. 25, 1931. v. L. CALHOUN LAWN MOWER GRINDER 1929 2 Sheets-Sheet 1 Filed Jan. 3l

Lttorneg-i Aug. 25,` 1931.

v. L. CALHOUN LAWN qMAOWER vGRINDER FiredJan.' s1, 192s 2 sheets-shea 2 Vm, LCQUM" iaieglis Aug; s, i931'v LAWNY Mowisneemniin 'Atpiai'oa 'fiieebramiary 31,*1eeagseifiaiiro. 336598.@ f

`it', The present invention relates' to machines v fordevice for grinding rand"sharpeningv lawn niowers andftheilikefand an object f of tliejinventinfis twprovide a device of- 5 'this'fcharacterwhich, maybe orluickly vand V i, easily mounted'iupon ya lawn" mower so that the frame KVof the lawn l mower inayjs'upport d i the grinding devicejjand theA latterfbe ,operi i w f ated for. not only feeding grinder vacross ,tlieblade's, but 'alsol'to' turiiftlie reel or Another object kof tlie'presentv invention fr istoprovidea grinder or sharpener'rof this character which may be 'used in conjunc-f '15 tion with grinders or sliarpeners for knives and the like hold, 'machine shops andthe like 1 'Anotlier object of,theinvention is to proi vide a *grinding or sharpening machine ofk this character which mayy be appliedto lawn i mowers and connectedto the reel thereof so f gasto operatefthelatter inapredetermined i p r`,-ifate ofrotationwithf'respect tothe feedingr` ofthe grinding elementy`lengthwise jof ythe 25fbl`ade-aiidto provide means for quickly dis-k engaging the blade'carrying reel so thatv the i l Agrinder may bereturnedto normal position; j

yor toene sideiofthe'lawn mower yframe; i

sa Anotherobjectof lie-invention isto; prok rvvideanim1'oro'vedf carriagev or traveller whieh f4 liasfanyadjustable stockforother suitable l devicer .tof lwhich the commercial hand Vgrind"- with respect to which thegriiider ,may be securedy in adjustedposition. i v f r`lfkinother feature of tliisfiiivention'isVr to ermay be quickly, and; easilyi appliedg'fand Lpi'fovlideha carriagel which/may carry the u ordinary commercialy grinder so 'that the llatter may be operated independently ofthe 4o,y movement of vthe carrierf-orftlie rotation of f the blades of the lawn moweriso thattliegde? siredy speedofthegrinder lwheel may be ob'- f tainedf according to u the condition ofy the "a V blade lbeinglsharpened.

-Arfurther7 andveryimportaiitffeature Yofy the present invention,-is to provide a sharp]` ener or grinding attachment of this charac-r "terjwhich comprises' relativelyvr few kpz'irts fa which may beeasily ,and `quickly assembled,

which may be easilyfand quickly applied -ings,wherein: n v n ,n .i V

Figure' lxis aside elevation, partly in secf` 4 f tions, of a lawn mower frame havingigcerfA which are usedin thev housey to a law'iim'owerv frame; providing a struc-jr i ture which is economical Land one which may be easily and quickly'applied to aflawin mower and removed therefrom.y f. j f y i The above, and various other objects and advantages `*of thisr invention will .be in part described in,` and inpart understood' from,V the yfollowing ing illustrated in the accompanying tain parts removed and disposedin inverted position with thejsharpener ofthis invention applied thereto.` Y Y n y A* f Figure 2 is'fan end elevation ofthe saine,

part being shown in section along the line o 'i l 2&2 of Figure l. A i v A 1 u n Figure 3 is a topk plan view of the saine.

-fligure lis a detail perspective view,en. Y

Figure-5 is a detail yperspective view oft one yof (the adjustable links .employedy for f supportingthe'bracket plate. l

,Figuref isa detail carriage orf traveller, yand `Figure 7 isa side elevationofa ymodiiied; ff, f

form ofcombined bracket plate and'bracketjs'o y n, t f

arm'. y u u t Referring now to the drawings, the lawn;`

mower tor whichthe inventionniaypbe Aap-fd.;y plied; is of conventional vention may of course be readily appliedl to lawn mowers of different construction and different sizes.

In the preseiituinstanedthe'lawnmower `is disclosed kas lbeing in inverted position,

and with the wheels and power transmission gears removed: In tne present instance the fran'ie ofthe lawn mower comprises the end l disks 10Qconnected togetheratone sideby a cross Vrod 1l, andhaving at` its opposite side frame-arms l12 between.y which the ground lroller 13 is mounted, r,and between` WhdlVY is also mounted the fixed bladefor, ihe reel ll5 is of theusua form provided y n n with spirally arranged blades 16. [The reel'` detailed description of y,the f v present preferred embodiinent-,the.same be#y larged7 Vof `one `of the bracket plates ein` E y Sie@ Qievaiioiitfih f isinoiinted on al shaft 17 which has bear,- ing in and extends beyond the opposite'end disk 10, the projections of the shaft 17Yare taken advantage of in the applicaf tion of the present attachment tothe lawn i mower.

The diskshlO) are provided` in the usual manner with the stub shafts 18 which project from theopposite' outer sides of the disks 10 andare employed for supporting the vground or powerv wheels ofythe mower;

Thev invention comprises a track iii-aine {which has a pair 0l rods 19 which-,arosecured in spaced parallel relation 2O through Vwhich the opposite ends oit' the 'rods 19 project, and against the opposite sides of which ybindinginiits 21 engage. The bracket plates. 2O are 'projected at oiie'end beyond thel track.

frame and are provided upon suoli ends with adjustable supporting legs 22.

As n'shown particularlyin Figure .2, the

attaClimentl is 'adapted to bie' secured to the j upper part of the lawn mower frame when inverted7 and the supporting legs 2.2" are Vadapted vtofeXtend downwardly at one lside of the lawn rr'nower for holding the bracket.

plates .in substantially horizontal position.

Each y*leg v22 comprises afpair ol slideably connected sections held inadjusted position by clamping bolts 23 and pivot-ally mounted on pins24 carried by the bracket plates 20.

vEachlegf22 is adapted'to beadjii'sted inte 'outwardly inclined position by Va clamping bolt 25`whichis carried by the leg 22 and engages inan arcuate slot 26 which is formed inthe-Vend of Ythe adjacent bracket plate 20.

lThe track frame is provided'at opposite Y ends each with a bracket arm 27. Thev inner .socket 248 adapted to embrace aV stubA shaft 18, 'and to be clampedr thereon in adjustedl end bleach" aimi'27 is provided with aV split position by a bolt 29x01* the like.; The outer end or" each bracket `arni-27 terminates in a substantially" Aflat plate 130 which is welded .-.ortherwise suitably VsecuredY across the inder sidesof `the rods v19v inwardly ot the bracket plates 20. The bracketarins 27 'are radjiistably held as to* length by clamping holding the' bracket'plates 2O in substantialiin adjusted position. ofthe link 32 is 'adapted to'be riveted or otherwise suitably securedV to the bracket. plate 20 while the other section is Vprovided bolts 316iL the" like@ v,For the purpose of 1y' horizontal "position above the framel of Ythe lawn mower, adjustable links 32 are This comprises two flat bars `with provided. their ends arranged in overlapping relation anda stra 'erguido ieceBS secured to one oi 'thebars and through v.which lthe other y l bar isfadapted to reely'slide.Y

n ne'bar is slotted,' and the other bar car'- riesr clamping bolts 341:0 seciiretlie sections One of the sections in onesidfe withV a recess or.Y socket jadapted 16 carried thereby. Y j y Slideably mounted -iiponthe track rodsV '19" vto engacc over an extension 36 of the reel shaft 17"?` A pivoted plate 37 is carried upon the links 32 and adapted to engage over the vopposite sideof the shalt extension 36 and cooperate with the sock'et for holding the links firmly tothe shaft extension 3G.

The shaft extension 3Giis provided at one end with a sockety 58 adapted jto" engage over the outerend ot the reel shalt 17 andis sefV curedtheretoby Ya set Vscrew ;orf the like.y

lThe lother end ioigthe extension shaft 3G j isprovided wim a pinion39 adapted Yto mesh with aV gear wheel 40 which is carried upon a pin orsliaft 41 mounted on the outer end cfa biaclretlarm 42. `The bracketariii 42 Ais securedto the bracket plateY 20 by atpiii 48 and is adi pted to swing on" the pin linto and out otengageinent with the pinion 39.

The *bracket arm l42 carriesv ay clamping bolt Y'44 which projects through arcuate slot 45 in the bracket plate to admit ire-e ad.-

justment of theA arin :42 and the clampingl of the same in adjusted position.v

" rlhe frame arms l12 are provided with the 'j usual-apertures 'for the adjusting vscrew oi: the lixed blade,*aiidthese'apertures are uti#v lized vortlie support of removable screw rods 46` having heads 47 provided' with threaded' apertures Ito adjustably receive therethrough tli'ethreadedr` end ol adjusting screws 48. The 'adjusting' screws 48 are swiveled" or'otherwise suitably carried in`VVK downwardly extending liigs'l4r9 which may be carried by -the'slot "plates 30 andwhich register withthe ,heads Y27.l The adjusting screws 48. are provided with liandlesupon their outer ends to admit o the easy tuining ofthe screw so as to adjust the/tinck j tframe toward and from the fixed blade 14V versely of the rods 19 and which 'is provided' 'i near its yopposite 'endswith' transversely exj' tending split sockets orapcitures 51 V4tor slide'ably receiving the rods19 therethrough. Binding screws 52 are threaded in theopposite ends of the locks 50. and through 'the split"portionsfoier the Ysockets 51 so as to contract `or admit of the expansion of. theV socket openings to secure the desired en-v gagement ofthe carriage 50 upon the rods 19; The carriage 50 is provided at onesi'de 1 with 'a stock jorbar 'pivoted to they carj riage '50 at 54' and havingf'a setrscrew 55. which engages the c'arrra'ge 50vr for adjustably supporting the stock' 53 the desired angle. LThe stock 53 isfadapted vto support. an Aordinary commercial` grinderV 56, the

.stock 53 adapted to itiii hesocket'ol the grinder in lieu of the edgev cfa work bench,

arvtable or the like5 and to be secured through f whichis held-inpositionto 'engage the edge 56' is adju'stedl u "above-idescribed parts. n

portionsy of ythe, 'blades-16 when the grinder pon the carriage bythe handlel59 in the usualmanner by meanslof ilo 1 which the grindin'gwheel is rotated, and

j the-position vof the grinder 56 as above disrclosed is such that the liandle'j59kjmay be d freely turned by onehand.

and forth from end to 'end in the track frame, and for accomplishing this purpose, a threaded shaft 60fis ,journalled at oppo- V site Vends in vthe bracket platesf20,-and pref#y yera'blyI ina position` between the rods 19. TheV carriage 50, kas shown in Figure 6, `is I provided vbetween the sockets ',51, with a threaded opening through which 'the Shaft y 60 maybe'threaded and by means of rwhich s the carriage 50 is slid lengthwiseof the rods 19. Theshaft 60 extends beyond one ofthe .l

' bracket plates 20 andis provided-.upon itsk -f outer end with a`handle62 ofrcrank' form M or the likefby ymeans onf-which the shaft V60 y may be manually turned., The shaft 60 is '"alsoxprovided, near the handleVV 62, with ra Y l,gear wheelf63 which is adaptedto meshr with `a gearwheel 40 and to rotate thelatter -so as in.,-turn vto rotate the pinion, 39'andf thus be* ground" and sharpened, 'the ycon'ubined vbracket'a1-1n* and bracket yplate of 'Figure 7 fmay substituted in the structure for the lbracket plate20k and the'bracket arm 27. In

.Where itis desired to provide a .'device'v'of f n .this character for use in a shop york the like where',` lawn mowersjof di'erent sizes are to Figure the' bracket yarml l641 is yof Vthe same f structure as the bracket arm 27 with the exception thatthefupper end of the bracket vvarm '64, isr provided with a key head in'the'f Y forniof a slot plateof'the 'construction' and size oflthe bracket plate 20, as shown atw65 innligure. 7. The fplate 65.l is'adapted to project :upwardly .fatv right 'angles to the trackbars 19 and in linewiththe bracket arm"64. g The platev 65 is provided with vend i 'di "and intermediate openings for thereception i y'respectively of the 'track'4 bars 1.9 andthe i l 'they bracket v(istinto correct lalignment* with -thestubV shaft 18 of y lawn .mowers ofv differ-y ent lengths; f

; .The carriage',r 50 kis adapted to be fed back attlie desired speed of rotation )The fuse, and {operatioii joffthe shin-.penesL isasfoinnwst.l f '2 'y f f The :bracket arms 27*y vv"secured of their s'plit sockets 28 `toy the stubgsha'fts'. i y 18 of! the :lawnmowen y `As aboveexplained,

the. wheelsV and.V gears are Vremoved fromf'thefy j lawn mower-andfthefflatter is turned 'overf Thegrinder 561 isfalsoprovided with ya and',A V'is supported upon the forward;hedges;` yof'ftheiframe disks 10,as' shown` to `advan-l tage' in vFigure" A2.v The kbracket arms 527 holdgthe frame: trackv horizontally ati' they upperlside ofthe lawn mower and the linksl 'l 32 are" adj usted',-and"the ,extension shaft 361 is also adj usted yinto positiony on s the lend of the reelshaft 17.` 'An ordinary commercial ygrinder l56,',whi'ch'is :used forsharpening knives, vtools and the-like, issecured to 'and I: 'f s adjusted yu'ponithevstock or bar 53 of the carriage so yas to rdispose the grinding wheelr 58 in the desired positionwith respectv tok of the blades 16 of the cutting reel of the lawn mower." f

The grinder56 is operated in the usual `manner by turning the handle 59 While the handle 62 is rotated so as to feed the y,carriageback and forth over the frame track lwhile at the same time causing the reel 15 to rotate.

The gear wheels v39, 40, and 63 arefi'so proportionedas to cause the reel 15 toA spinnyk respect to the feed of the carriage.

rByadjusting the hand screwsr 48 theel fr* y f track rframev ofv the devicemay bemoved .toward yandadjacent yto the fixed blade or.

cutter 14 of the lawn mower so that the latter may be sharpened by the grinder 56.

In this instance, the bracket arm .42 may be 5 swungvr into a position to move the gear wheel 40 out of engagement with the gear f wheels 39 and 63fso that the reel 15 need not be turned. kThe legs 22 may ofcourse be d adjusted to thed'esired angle and desired ,'1

height so as to support the bracket platesy j 1Ij ,i

20, which form the ends of the track frame,i

atthe desired angle and heightaccordingf' j to the adjustmentdesired kand they type of lawn mower, and size ofp'mower'tok which the present' attachment *maybe* connected.

g Itis yof course understood that various changes and modifications may be made yinr the.; detailsy of construction and design of the above specifically ydescribed embodiment of this invention, without departing from the spirit thereof, 'and being restricted only by the scope of the following claim. d What is claimed is:

'1 In a lawnv mower Sharpener, a pair of f track rods, bracket plates mounted across the opposite ends of said rods, bracket arms "1255-1, adaptedfor attachment toa lawn mower K' and engaging said rods for supportingthe ksame across onevsidelof the lawny mower, yadjustable legs carried by said bracket plates jforengaging the ground `to .support thev traekwrods in aidente poeton of adjustment, means for adjusting said bracket-plates; Y Y

with respect-,to f the Vfixed*blade of., the Lawn mower,anda for detachable connection with the; [shaft` olf-:the Cutting reel .of therlawn nnovvelgA` an extension v shaft for connection wth'the end of saidgcuttng reel shaft, ad-y justable links between-fthe extension shaft and the adjacent bracket pate5 a gear on mv Sadextension shaft,a seeondgeat carried by theV adjacent br'aoketplate and adapted to lengage the rst gear,v afeed shaft. mountedLin' said,loraeket plates between Said rods. and having a gear thereon meshing with said 15 second gear, a handle lfor turning theffeed shaft@ agoarriage mounted on said rodsv and engaging'lsaid feed shaft for operation there-- by, vand a toolgrinder mounted on' the @an riage.:

2,0L Vm LEONARDCALHOUN. y

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